Grand Portage Lake Weather Forecast

    • 63
    • 84

    Increasing Clouds

    • 48
    • 75

    Chance Rain Showers

    • 50
    • 74

    Partly Sunny

    • 56
    • 78

    Mostly Sunny

    • 57
    • 81

    Slight Chance Thunderstorms

    • 59
    • 82

    Chance Thunderstorms

    • 56
    • 79

    Chance Rain Showers

Today 3 Aug Iron

Mostly sunny. Near steady temperature in the lower 80s. South Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 3 Aug Iron

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the lower 60s. South Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Portage Lake Temperature Statistics

August Temperature

Manitowish Waters Airport (8.7 miles)

  • Lowest 1 August, 2026

    57.9 °F

  • Average August

    69.3 °F

  • Highest 1 August, 2026

    79.9 °F

Climate (2021–2026)

Manitowish Waters Airport (8.7 miles)

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  • Average Low 2021–2026

    29.7 °F

  • Average 2021–2026

    40.6 °F

  • Average High 2021–2026

    50.2 °F
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